﻿<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" 
	content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
	<style>
		#div1{width:200px;height:200px;background:#ccc;}

	</style>
</head>
<body>

<div id="div1"onmouseover="document.getElementById('div1').style.width:'400px';
document.getElementById('div1').style.height:'400px';
document.getElementById('div1').style.background:red;"
onmouseout="document.getElementById('div1').st  yle.width:200px;
document.getElementById('div1').style.height:200px;
document.getElementById('div1').style.background:#ccc;">

</div>
</body>
</html>